Walmart offers the LEGO Ideas Women of NASA Building Kit for $19.99. (Amazon charges the same with free shipping for Prime members.) Choose in-store pickup to avoid the $5.99 shipping fee. That's a few cents under last month's mention and the lowest price we've seen. (It's the best deal now by $7.) It includes Nancy Grace Roman, Margaret Hamilton, Sally Ride, and Mae Jemison minifigures among displays representing the Hubble Space Telescope, Apollo Guidance Computer, and Space Shuttle Challenger.